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Posted

Your picture shows a Mi-8T which didn't have the PZU dust protection devices our version has. Were those large filters used on versions which had PZUs?

Posted

Yes. Maybe not those specific types, however.In the U.S., a company I've worked with uses filters similar to those (specifically: http://www.pall.com/main/aerospace-defense-marine/product.page?id=53117) in place of the PZUs. The PZUs are roughly 70% effective, while the larger filters are quite a bit more effective than that (though I don't have actual numbers).

 

EDIT: I'm not personally a fan because it means I can't use the hatch to get on top of the aircraft for routine maintenance.

Posted

Interesting, never seen those before. Thanks for the info! I'm not going to say no to having another thing I can put on my favourite helo, though as of now it wouldn't be very useful.

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